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[SPACE] Meteorite Falls in Eastern Russia, Causes Damage: Reports - Page 13

post #121 of 244
Maybe if there are any Russian readers who saw this, they may want to comment ?
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The Watt Gobbler
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post #122 of 244
Switzerland is the only place I know where the whole population has nuclear war shelters. Everywhere else - well, complaints of overpopulation are a feature of modern culture, no ?
The Watt Gobbler
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The Watt Gobbler
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post #123 of 244
Quote:
Originally Posted by computerparts View Post


This is what I'm thinking. There's no way we don't know about these things. We have a multi million dollar installation that can detect icbms or even something as small as a weather balloon, yet we can't see a 40 ton rock knocking at our door. There's even speculation that this thing was shot at by the Russian military. We'll never know.

There is a HUGE difference between detecting and tracking a missile on Earth and tracking an interstellar object from millions of miles away traveling at 50 km/s.

Let's put you in an observatory and see how successful you are at identifying and tracking celestial objects. Nobody's perfect and keeping tabs on the entire sky is a huge project.
Edited by aroc91 - 2/15/13 at 3:04pm
    
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post #124 of 244
VEGETA HAS LANDED
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post #125 of 244
Quote:
Originally Posted by dogbiscuit View Post

Maybe if there are any Russian readers who saw this, they may want to comment ?

Nobody from regular people here knows what has really happened, but for sure something is going on... Big chance of gov or milit ****...
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Made in USSR
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post #126 of 244
Quote:
Originally Posted by computerparts View Post


This is what I'm thinking. There's no way we don't know about these things. We have a multi million dollar installation that can detect icbms or even something as small as a weather balloon, yet we can't see a 40 ton rock knocking at our door. There's even speculation that this thing was shot at by the Russian military. We'll never know.

Altitude of an ICBM = ~4000 Miles
Speed of an ICBM = ~10,000MPH max, much slower during launch
Where to look = between LEO and the surface of the earth

Altitude of meteor = Almost no limit
Speed of meteor = 33,000MPH, possibly more
Where to look = LEO and ALL OF SPACE

Basically meteors are much much faster, travel much higher, and can be almost anywhere in a gigantic area that is much further away than ICBMs. Radar is about a lot more than size. It's imposible to search a volume around the earth all the time, unless you know the expected position of what you are looking for, like a satellite or craft.
    
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post #127 of 244
This is great. Can we get something a lot bigger?smile.gif
post #128 of 244
Quote:
Originally Posted by DayoftheGreek View Post

Basically meteors are much much faster, travel much higher, and can be almost anywhere in a gigantic area that is much further away than ICBMs. Radar is about a lot more than size. It's imposible to search a volume around the earth all the time, unless you know the expected position of what you are looking for, like a satellite or craft.

In addition, systems built to detect ICBMs are looking in the wrong directions to detect NEOs. Ground-based radars are focused on the horizon, while space-based radars are focused down towards the planet's surface. Even if a meteor approached Earth in full view of a ground-based radar, its position outside the atmosphere would probably cause the image-processing software to ignore it.
    
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post #129 of 244
I would like to see something bigger hitting a deserted area, hopefully traveling slow enough so the media can capture the whole event, see how devastating it can be, and then see all humanity investing in space research..
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post #130 of 244
Quote:
Originally Posted by Blameless View Post

Quote:
Originally Posted by dogbiscuit View Post

I Haven't seen many explanations of the explosion. After all, it's just a rock, not flying C4, so maybe parts of it vapourise - expanding gasses ?

These rocks are not objects designed with aerodynamics in mind, they are irregularly shaped chunks of rock and/or metal.

What do you think happens when you have such an object moving at extreme speed, that due to stresses such as entering an atmosphere, fails structurally, and within a split second increases in surface area several orders of magnitude?

It's going to disintegrate, and, due to friction, rapidly exchange most of it's kinetic energy for thermal energy, exploding in a fireball.

A huge number of meteors do this, and if they are big enough, and low enough when they do, we get what we saw in Russia today.

This man speaks in truth!

Take a chunk of ice, and throw it as HARD as you can against a wall. It will explode. Essentially the same premise here, only the wall is our atmosphere and the snowball is a giant metal filled rock flying at 13km/sec. Most of it gets burnt up from the atmosphere, what's left is still a fiery blaze in the sky until it can't take the stress anymore and it literally explodes into gazillions of particles. The result of speed+mass exploding creates a sonic shockwave, essentially, a sonic boom, but way more powerful. I heard on the radio that it was predicted that the shockwave was 30x as powerful as the Hiroshima bomb. That's a hell of a lot of force coming from something so small.

Now, look at the largest crater found thus far, http://en.wikipedia.org/wiki/Vredefort_crater

They estimate the object was about 5-10Km in diameter, and it created a crater that was roughly 300km wide in solid earth. A bad day for anyone strolling through the area that day...
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